/**
 * @Title: MD5Util.java
 * @Package com.dld.util
 * @Description: TODO
 * @author: 姓名
 * @date 2014-4-15 下午3:31:40
 * Copyright: Copyright (c) 2013 
 * Company: DLD.
 * @version V1.0
 */

package com.ihep;
import java.security.MessageDigest;


/**
 * 
 * @Description: MD5加密类
 * @author: 许智皓
 * @date 2015-2-13 下午3:48:44
 
 * Company: 袋袋金.
 * @version V1.0
 */
public class MD5Util {
	
	private final static String[] hexDigits = { "0", "1", "2", "3", "4", "5",
		"6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };
	
	/**
	 * 
	 * @Title: byteArrayToHexString
	 * @Description: 转换字节数组为16进制字串
	 * @author: wc
	 * @param b
	 * @return 16进制字串
	 * String
	 */
	public static String byteArrayToHexString(byte[] b) {
		StringBuffer resultSb = new StringBuffer();
		for (int i = 0; i < b.length; i++) {
			resultSb.append(byteToHexString(b[i]));
		}
		return resultSb.toString();
	}
	
	private static String byteToHexString(byte b) {
		int n = b;
		if (n < 0)
			n = 256 + n;
		int d1 = n / 16;
		int d2 = n % 16;
		return hexDigits[d1] + hexDigits[d2];
	}
	
	/**
	 * 
	 * @Title: MD5Encode
	 * @Description: 返回md5加密字符串
	 * @author: 姓名
	 * @param origin
	 * @return
	 * String
	 */
	public static String MD5Encode(String origin) {
		String resultString = null;
	
		try {
			resultString = new String(origin);
			MessageDigest md = MessageDigest.getInstance("MD5");
			resultString = byteArrayToHexString(md.digest(resultString
					.getBytes()));
		} catch (Exception ex) {
	
		}
		return resultString;
}

}